Index Catalog // ScholarsArchive@OSU

A comparison of porous polymers used in collecting organic volatiles in foods

Creator:: Boyko, Alayne Linda
Abstract:: Porapak Q, Chromosorb 102, and Tenax GC, three porous polymers commonly used as adsorbents in headspace analyses were investigated. The retention times of various low-boiling compounds relative to water were measured on the collection columns to determine which compounds would be lost during the water removal step employed after sampling...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF ALAYNE LINDA BOYKO for the degree

Porous polymer trapping for GC/MS analysis of volatile flavor compounds in corn

Creator:: Boyko, Alayne Linda
Abstract:: Flavor profiles of canned and frozen whole kernel sweet corn were obtained by entraining the volatile compounds on Porapak 0 traps and by subsequent analysis on temperature-programed, 500' by 0.03" ID capillary columns (SF-96 or Carbowax 20M). Identification was based on GC/MS data, retention indices (I[subscript E]'s) and retention times....
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE iHLSIS OF ALAYNE LINDA BOYKO for the degree

Stability of Biochar Under Storage Conditions and Evaluating its Potential as a Carbon Sequestration Tool in the United States

Creator:: Rovero, Matthew
Abstract:: Biochar has shown promise as a soil amendment for improvement of agricultural and forest productivity, remediation of heavy metals, and sequestration of carbon, but has not yet been adopted for widespread use in any of these applications. By assessing the production potential as a carbon sequestration tool, and the stability...
Resource Type:: Masters Thesis
Full Text:: Rovero, Author CONTRIBUTION OF AUTHORS Dr. Mark G. Johnson contributed to “Effect of

Context matters : A multi-scale assessment of riparian tree response to upslope density reduction

Creator:: Ruzicka, Kenneth J., 1982-
Abstract:: Forest management is rapidly undergoing a transformation from a discipline based on efficient commodity production to one for multiple uses, especially on federally managed land in the United States. This new management paradigm has challenged silviculturists to develop and adapt forest management techniques that can deal with increased demands. Using...
Resource Type:: Dissertation
Full Text:: Interior, US Geological Survey. Cumming, G., P. Olsson, F. S. Chapin, III, and C. S. Holling. 2013

The Effects of Host and Pathogen Variation on Infection Dynamics in the Amphibian-Chytrid System

Creator:: Dang, Trang D.
Abstract:: This dissertation uses manipulative experiments to explore amphibian-Bd infection dynamics. Although there has been almost two decades research since the discovery of Bd, many questions still remain regarding what conditions mediate chytridiomycosis virulence. My research shows how certain host and pathogen factors can influence disease virulence. Identifying how host and...
Resource Type:: Dissertation
Full Text:: Table B1 Initial mass (g) and SVL (mm) of donor hosts exposed to Bd ...................134 Table B2

Emerging infectious disease in lentic environments : the ecology and biogeography of the amphibian chytrid fungus Batrachochytrium dendrobatidis, with perspectives on water quality, limnology, and chemical contaminants

Creator:: Chestnut, Tara
Abstract:: Biodiversity losses in terrestrial, freshwater, and marine systems are accelerating at a global scale and the most threatened vertebrate taxa are those associated with freshwater habitats. The causes of biodiversity losses are often complex and include synergistic effects of natural and human-induced stressors, such as habitat loss and fragmentation, urbanization,...
Resource Type:: Dissertation
Full Text:: occurrence (Olson and Ronnenberg 2014). 4 To understand the pathology and conservation

Flavors associated with the use of Cheddar cheese whey powder in ice cream mix

Creator:: Andrews, Matthew V.
Abstract:: Flavor problems associated with the use of cheddar cheese whey in the formulation of ice cream and other food products were investigated. During spray drying of whey, which transforms bulky liquid whey into an easily transportable and storable powder, various degrees of off-flavor development may occur depending on the care...
Resource Type:: Masters Thesis
Full Text:: , and my special friend, Alayne, for their understanding and encouragement. TABLE OF CONTENTS

Ontogenetic Shifts in Disease Response in Native and Invasive Anuran Species

Creator:: Urbina Gonzalez, Jenny Cecilia
Abstract:: This dissertation presents a different approach to understanding how amphibians are responding to disease through ontogeny. Although numerous efforts have been conducted to understand host responses to the fungus Batrachochytrium dendrobatidis (Bd), studies have been restricted to distinct developmental stages. This dissertation provides information on host response to Bd across...
Resource Type:: Dissertation
Full Text:: , Ronnenberg KL, Powell CI, Walker SF, Bielby J, Garner TWJ, Weaver G, Fisher MC, The Bd Mapping Group (2013

Bioenergetic evaluation of diel vertical migration by bull trout

Creator:: Eckmann, Madeleine
Abstract:: I evaluated hypotheses related to growth as a driver of depth use and diel vertical migration by bull trout (Salvelinus confluentus) in a thermally stratified reservoir. I applied a bioenergetic model to evaluate growth of bull trout in relation to potential patterns of diel depth use by bull trout in...
Resource Type:: Masters Thesis
Full Text:: -Wert, Ivan Arismendi, Kelly Christiansen and Kathryn Ronnenberg spent hours patiently teaching me

The oxidative demethylation of certain N-methylhydrazines by microsomal liver enzymes

Creator:: Wittkop, Judith Anne
Abstract:: The presence in rat liver microsomes of an enzyme system which demethylates N-methylhydrazines and azo compounds to formaldehyde has been reported. Some of the compounds found to be substrates were monomethylhydrazine, N-isopropyl-α-(2-methylhydrazino)- p-toluamide and the azo derivative of the latter hydrazine. This enzyme can be classified as a mixed function...
Resource Type:: Dissertation
Full Text:: ., Portland, Oregon. Rats used in experiments weighed 250-300 g. Fr e s h pork livers were generously

ScholarsArchive@OSU

A comparison of porous polymers used in collecting organic volatiles in foods

Porous polymer trapping for GC/MS analysis of volatile flavor compounds in corn

Stability of Biochar Under Storage Conditions and Evaluating its Potential as a Carbon Sequestration Tool in the United States

Context matters : A multi-scale assessment of riparian tree response to upslope density reduction

The Effects of Host and Pathogen Variation on Infection Dynamics in the Amphibian-Chytrid System

Emerging infectious disease in lentic environments : the ecology and biogeography of the amphibian chytrid fungus Batrachochytrium dendrobatidis, with perspectives on water quality, limnology, and chemical contaminants

Flavors associated with the use of Cheddar cheese whey powder in ice cream mix

Ontogenetic Shifts in Disease Response in Native and Invasive Anuran Species

Bioenergetic evaluation of diel vertical migration by bull trout

The oxidative demethylation of certain N-methylhydrazines by microsomal liver enzymes

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